package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category>implements CategoryService {

   @Autowired
   private DishService dishService;

   @Autowired
   private SetmealService setmealService;

    /**
     * 根据id删除分类，删除之前需要进行判断
     * @param ids
     */
    @Override
    public void remove(Long ids) {
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper=new LambdaQueryWrapper<>();
        //添加查询条件，根据分类id进行查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,ids);
        int count1=dishService.count(dishLambdaQueryWrapper);
        //查询当前分类(套餐)是否关联了菜品，若已关联，抛出一个业务异常
        if(count1>0){
            //已关联菜品，抛出一个业务异常
            throw new CustomException("当前分类下关联了菜品，不能删除");
        }
        //查询当前分类（菜品）是否关联了套餐，若已关联，抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper=new LambdaQueryWrapper<>();
        //添加查询条件，根据分类id进行查询
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,ids);
        int count2=setmealService.count(setmealLambdaQueryWrapper);
        if (count2>0){
            //已关联套餐，抛出一个业务异常
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }
        //正常删除分类
        super.removeById(ids);
    }
}
